[Excerpt] … In the previous chapters, I studied in detail the sampling zones delineated as Skew Valley, Gum Tree Valley Spirit Group (GTVS), Eagle Group (GTVE), Kangaroo Group (GTVK), Woman Group (GTVW), Top Group (GTVT), and the small ‘GTVT Village’. These sample zones are the areas of higher density of petroglyphs observed in the two valleys. They are located in different topographical places: near the sea, close to the middens, at the entrance of a valley, on top of hills commanding a view of the coast and the valley, at the top of a valley … all these areas can be considered as ‘sites’. It is time now to compare them in order to show their differences and their similarities, to understand clearly the use of the environment by the first inhabitants of this region and its evolution through the time. For each test zone a cumulative graph was established with the database. The individual site data were then combined and are presented here … to provide information that details, develops and summarizes the multiple observations made separately during the studies of these different ‘groups’.
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